As you can guess, the problem is still there :'(
I'm a bit skilled in electronics but before I do the hardware change, I'd like to ask you something ...
How comes that resetting the POD doesn't solve anything, I need to reboot Windows to get it working fine again.
Plus, a very strange thing happened : the USB dropout happened (no more playback from any software) but I was still able to record sound from the POD through USB with Window's Sound Recorder. I listened to the recorded file after rebooting and it's just fine.
Strange, huh ?
Please help me guys :'(